Table 4.
Table of number of European infants colonized at any level by B. longum subsp. infantis at 1 year of age by breastfeeding status. Prevalence of B. longum subsp. infantis appears to decrease rapidly during the weaning period, supporting the assumption that vertical transmission will be rare. p-values are for the Chi-square tests comparing B. longum subsp. infantis detection in still breastfed vs. no longer breastfed infants.
| Country | Breast Fed at 1 Year (European Countries) or 2 Years (Bangladesh) | B. longum Subspecies infantis Detected | B. longum Subspecies infantis Not Detected | Percentage of Infants Colonized |
|---|---|---|---|---|
| Austria (p = 0.003) |
Yes | 5 | 14 | 36% |
| No | 2 | 70 | 2.8% | |
| Finland (p = 0.65) |
Yes | 1 | 37 | 2.6% |
| No | 0 | 91 | 0% | |
| Germany (p = 1) |
Yes | 1 | 18 | 5.3% |
| No | 2 | 89 | 2.2% | |
| Switzerland (p < 0.0001) |
Yes | 10 | 24 | 29% |
| No | 6 | 135 | 4.3% | |
| Bangladesh (p = 0.35) |
Yes | 13 | 51 | 20.3% |
| No | 5 | 40 | 11.1% |